7123665605 has 32 divisors (see below), whose sum is σ = 10122796800. Its totient is φ = 4711329792.

The previous prime is 7123665587. The next prime is 7123665613. The reversal of 7123665605 is 5065663217.

It is a cyclic number.

It is not a de Polignac number, because 7123665605 - 2²⁴ = 7106888389 is a prime.

It is a super-2 number, since 2×7123665605² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76901 + ... + 141989.

It is an arithmetic number, because the mean of its divisors is an integer number (316337400).

Almost surely, 2^7123665605 is an apocalyptic number.

It is an amenable number.

7123665605 is a deficient number, since it is larger than the sum of its proper divisors (2999131195).

7123665605 is a wasteful number, since it uses less digits than its factorization.

7123665605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65213.

The product of its (nonzero) digits is 226800, while the sum is 41.

The square root of 7123665605 is about 84401.8104367436. The cubic root of 7123665605 is about 1924.1304313391.

The spelling of 7123665605 in words is "seven billion, one hundred twenty-three million, six hundred sixty-five thousand, six hundred five".