1366172071 has 24 divisors (see below), whose sum is σ = 1589410224. Its totient is φ = 1164334080.

The previous prime is 1366172069. The next prime is 1366172089. The reversal of 1366172071 is 1702716631.

It is not a de Polignac number, because 1366172071 - 2¹ = 1366172069 is a prime.

It is a super-2 number, since 2×1366172071² = 3732852255160858082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366172771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 994341 + ... + 995713.

It is an arithmetic number, because the mean of its divisors is an integer number (66225426).

Almost surely, 2^1366172071 is an apocalyptic number.

1366172071 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1366172071 is a deficient number, since it is larger than the sum of its proper divisors (223238153).

1366172071 is a wasteful number, since it uses less digits than its factorization.

1366172071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731 (or 1714 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 1366172071 is about 36961.7649876193. The cubic root of 1366172071 is about 1109.6051597323.

The spelling of 1366172071 in words is "one billion, three hundred sixty-six million, one hundred seventy-two thousand, seventy-one".