77065631 has 12 divisors (see below), whose sum is σ = 79443000. Its totient is φ = 74751840.

The previous prime is 77065621. The next prime is 77065643. The reversal of 77065631 is 13656077.

It is not a de Polignac number, because 77065631 - 2⁶ = 77065567 is a prime.

It is a super-2 number, since 2×77065631² = 11878222962856322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77065591 and 77065600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77065621) 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, 517145 + ... + 517293.

It is an arithmetic number, because the mean of its divisors is an integer number (6620250).

Almost surely, 2^77065631 is an apocalyptic number.

77065631 is a deficient number, since it is larger than the sum of its proper divisors (2377369).

77065631 is a wasteful number, since it uses less digits than its factorization.

77065631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 349 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 77065631 is about 8778.7032641501. The cubic root of 77065631 is about 425.5529246243.

The spelling of 77065631 in words is "seventy-seven million, sixty-five thousand, six hundred thirty-one".