77351661 has 12 divisors (see below), whose sum is σ = 112816288. Its totient is φ = 51066504.

The previous prime is 77351611. The next prime is 77351663. The reversal of 77351661 is 16615377.

It is not a de Polignac number, because 77351661 - 2⁶ = 77351597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77351663) 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, 40795 + ... + 42648.

Almost surely, 2^77351661 is an apocalyptic number.

It is an amenable number.

77351661 is a deficient number, since it is larger than the sum of its proper divisors (35464627).

77351661 is a wasteful number, since it uses less digits than its factorization.

77351661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83552 (or 83549 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 77351661 is about 8794.9793063998. The cubic root of 77351661 is about 426.0787561857.

The spelling of 77351661 in words is "seventy-seven million, three hundred fifty-one thousand, six hundred sixty-one".