77679682 has 4 divisors (see below), whose sum is σ = 116519526. Its totient is φ = 38839840.

The previous prime is 77679659. The next prime is 77679691. The reversal of 77679682 is 28697677.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28697677 = 941 ⋅30497.

It can be written as a sum of positive squares in only one way, i.e., 69205761 + 8473921 = 8319^2 + 2911^2 .

It is a super-2 number, since 2×77679682² = 12068265991242248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19419919 + ... + 19419922.

Almost surely, 2^77679682 is an apocalyptic number.

77679682 is a deficient number, since it is larger than the sum of its proper divisors (38839844).

77679682 is a wasteful number, since it uses less digits than its factorization.

77679682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38839843.

The product of its digits is 1778112, while the sum is 52.

The square root of 77679682 is about 8813.6077743453. The cubic root of 77679682 is about 426.6801898654.

The spelling of 77679682 in words is "seventy-seven million, six hundred seventy-nine thousand, six hundred eighty-two".