7366172421 has 4 divisors (see below), whose sum is σ = 9821563232. Its totient is φ = 4910781612.

The previous prime is 7366172413. The next prime is 7366172459. The reversal of 7366172421 is 1242716637.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1242716637 = 3 ⋅414238879.

It is not a de Polignac number, because 7366172421 - 2³ = 7366172413 is a prime.

It is a super-2 number, since 2×7366172421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7366172421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7366152421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1227695401 + ... + 1227695406.

It is an arithmetic number, because the mean of its divisors is an integer number (2455390808).

Almost surely, 2^7366172421 is an apocalyptic number.

It is an amenable number.

7366172421 is a deficient number, since it is larger than the sum of its proper divisors (2455390811).

7366172421 is a wasteful number, since it uses less digits than its factorization.

7366172421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455390810.

The product of its digits is 84672, while the sum is 39.

The square root of 7366172421 is about 85826.4086455911. The cubic root of 7366172421 is about 1945.7212711231.

The spelling of 7366172421 in words is "seven billion, three hundred sixty-six million, one hundred seventy-two thousand, four hundred twenty-one".