7665213547 has 4 divisors (see below), whose sum is σ = 7739633200. Its totient is φ = 7590793896.

The previous prime is 7665213533. The next prime is 7665213559. The reversal of 7665213547 is 7453125667.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7453125667 = 13 ⋅573317359.

It is a cyclic number.

It is not a de Polignac number, because 7665213547 - 2¹⁹ = 7664689259 is a prime.

It is a super-2 number, since 2×7665213547² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7665213497 and 7665213506.

It is not an unprimeable number, because it can be changed into a prime (7665210547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37209672 + ... + 37209877.

It is an arithmetic number, because the mean of its divisors is an integer number (1934908300).

Almost surely, 2^7665213547 is an apocalyptic number.

7665213547 is a deficient number, since it is larger than the sum of its proper divisors (74419653).

7665213547 is a wasteful number, since it uses less digits than its factorization.

7665213547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74419652.

The product of its digits is 1058400, while the sum is 46.

The square root of 7665213547 is about 87551.2052858212. The cubic root of 7665213547 is about 1971.7026470606.

The spelling of 7665213547 in words is "seven billion, six hundred sixty-five million, two hundred thirteen thousand, five hundred forty-seven".