690656654 has 16 divisors (see below), whose sum is σ = 1097521488. Its totient is φ = 324838272.

The previous prime is 690656653. The next prime is 690656677. The reversal of 690656654 is 456656096.

It is a happy number.

It is a super-2 number, since 2×690656654² = 954013227428951432, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 690656599 and 690656608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690656653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74969 + ... + 83675.

It is an arithmetic number, because the mean of its divisors is an integer number (68595093).

Almost surely, 2^690656654 is an apocalyptic number.

690656654 is a deficient number, since it is larger than the sum of its proper divisors (406864834).

690656654 is a wasteful number, since it uses less digits than its factorization.

690656654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11059.

The product of its (nonzero) digits is 1166400, while the sum is 47.

The square root of 690656654 is about 26280.3472960309. The cubic root of 690656654 is about 883.9358202623.

The spelling of 690656654 in words is "six hundred ninety million, six hundred fifty-six thousand, six hundred fifty-four".