77670400040 has 32 divisors (see below), whose sum is σ = 174777016680. Its totient is φ = 31064850432.

The previous prime is 77670400013. The next prime is 77670400043. The reversal of 77670400040 is 4000407677.

It can be written as a sum of positive squares in 4 ways, for example, as 60664675204 + 17005724836 = 246302^2 + 130406^2 .

It is not an unprimeable number, because it can be changed into a prime (77670400043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295784 + ... + 492776.

Almost surely, 2^77670400040 is an apocalyptic number.

It is an amenable number.

77670400040 is an abundant number, since it is smaller than the sum of its proper divisors (97106616640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77670400040 is a wasteful number, since it uses less digits than its factorization.

77670400040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206861 (or 206857 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 35.

The spelling of 77670400040 in words is "seventy-seven billion, six hundred seventy million, four hundred thousand, forty".