77400070670 has 96 divisors (see below), whose sum is σ = 159990072480. Its totient is φ = 26726319360.

The previous prime is 77400070669. The next prime is 77400070673. The reversal of 77400070670 is 7607000477.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77400070673) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15412760 + ... + 15417780.

It is an arithmetic number, because the mean of its divisors is an integer number (1666563255).

Almost surely, 2^77400070670 is an apocalyptic number.

77400070670 is an abundant number, since it is smaller than the sum of its proper divisors (82590001810).

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

77400070670 is a wasteful number, since it uses less digits than its factorization.

77400070670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5218 (or 5139 counting only the distinct ones).

The product of its (nonzero) digits is 57624, while the sum is 38.

The spelling of 77400070670 in words is "seventy-seven billion, four hundred million, seventy thousand, six hundred seventy".