77670377402 has 24 divisors (see below), whose sum is σ = 117865154484. Its totient is φ = 38387074944.

The previous prime is 77670377401. The next prime is 77670377443. The reversal of 77670377402 is 20477307677.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 71331192241 + 6339185161 = 267079^2 + 79619^2 .

It is a super-2 number, since 2×77670377402² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77670377401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12579188 + ... + 12585360.

Almost surely, 2^77670377402 is an apocalyptic number.

77670377402 is a deficient number, since it is larger than the sum of its proper divisors (40194777082).

77670377402 is a wasteful number, since it uses less digits than its factorization.

77670377402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6974 (or 6871 counting only the distinct ones).

The product of its (nonzero) digits is 2420208, while the sum is 50.

The spelling of 77670377402 in words is "seventy-seven billion, six hundred seventy million, three hundred seventy-seven thousand, four hundred two".