77660231 has 16 divisors (see below), whose sum is σ = 88331040. Its totient is φ = 67630080.

The previous prime is 77660227. The next prime is 77660257. The reversal of 77660231 is 13206677.

It is a cyclic number.

It is not a de Polignac number, because 77660231 - 2² = 77660227 is a prime.

It is a super-2 number, since 2×77660231² = 12062222957946722, 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 (77660221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42815 + ... + 44591.

It is an arithmetic number, because the mean of its divisors is an integer number (5520690).

Almost surely, 2^77660231 is an apocalyptic number.

77660231 is a deficient number, since it is larger than the sum of its proper divisors (10670809).

77660231 is a wasteful number, since it uses less digits than its factorization.

77660231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1954.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 77660231 is about 8812.5042411337. The cubic root of 77660231 is about 426.6445733053.

The spelling of 77660231 in words is "seventy-seven million, six hundred sixty thousand, two hundred thirty-one".