77400071 has 8 divisors (see below), whose sum is σ = 89316864. Its totient is φ = 65698200.

The previous prime is 77400019. The next prime is 77400077. The reversal of 77400071 is 17000477.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77400071 - 2²² = 73205767 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77400071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77400077) 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, 52955 + ... + 54396.

It is an arithmetic number, because the mean of its divisors is an integer number (11164608).

Almost surely, 2^77400071 is an apocalyptic number.

77400071 is a deficient number, since it is larger than the sum of its proper divisors (11916793).

77400071 is a wasteful number, since it uses less digits than its factorization.

77400071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107461.

The product of its (nonzero) digits is 1372, while the sum is 26.

The square root of 77400071 is about 8797.7310143014. The cubic root of 77400071 is about 426.1676237930.

The spelling of 77400071 in words is "seventy-seven million, four hundred thousand, seventy-one".