77140775 has 6 divisors (see below), whose sum is σ = 95654592. Its totient is φ = 61712600.

The previous prime is 77140769. The next prime is 77140787. The reversal of 77140775 is 57704177.

It is not a de Polignac number, because 77140775 - 2¹² = 77136679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1542791 + ... + 1542840.

It is an arithmetic number, because the mean of its divisors is an integer number (15942432).

Almost surely, 2^77140775 is an apocalyptic number.

77140775 is a deficient number, since it is larger than the sum of its proper divisors (18513817).

77140775 is a wasteful number, since it uses less digits than its factorization.

77140775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3085641 (or 3085636 counting only the distinct ones).

The product of its (nonzero) digits is 48020, while the sum is 38.

The square root of 77140775 is about 8782.9821245406. The cubic root of 77140775 is about 425.6911936153.

The spelling of 77140775 in words is "seventy-seven million, one hundred forty thousand, seven hundred seventy-five".