11621166507 has 12 divisors (see below), whose sum is σ = 17515961424. Its totient is φ = 7410598800.

The previous prime is 11621166503. The next prime is 11621166511. The reversal of 11621166507 is 70566112611.

It is a happy number.

11621166507 is a `hidden beast` number, since 11 + 621 + 16 + 6 + 5 + 0 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (11621166503) and next prime (11621166511).

It is not a de Polignac number, because 11621166507 - 2² = 11621166503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11621166503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28070244 + ... + 28070657.

It is an arithmetic number, because the mean of its divisors is an integer number (1459663452).

Almost surely, 2^11621166507 is an apocalyptic number.

11621166507 is a deficient number, since it is larger than the sum of its proper divisors (5894794917).

11621166507 is a wasteful number, since it uses less digits than its factorization.

11621166507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56140930 (or 56140927 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The spelling of 11621166507 in words is "eleven billion, six hundred twenty-one million, one hundred sixty-six thousand, five hundred seven".