77616657 has 8 divisors (see below), whose sum is σ = 114987680. Its totient is φ = 51744420.

The previous prime is 77616647. The next prime is 77616667. The reversal of 77616657 is 75661677.

It is an interprime number because it is at equal distance from previous prime (77616647) and next prime (77616667).

It is not a de Polignac number, because 77616657 - 2⁴ = 77616641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77616647) 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, 1437319 + ... + 1437372.

It is an arithmetic number, because the mean of its divisors is an integer number (14373460).

Almost surely, 2^77616657 is an apocalyptic number.

It is an amenable number.

77616657 is a deficient number, since it is larger than the sum of its proper divisors (37371023).

77616657 is a wasteful number, since it uses less digits than its factorization.

77616657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2874700 (or 2874694 counting only the distinct ones).

The product of its digits is 370440, while the sum is 45.

The square root of 77616657 is about 8810.0316117481. The cubic root of 77616657 is about 426.5647637363.

The spelling of 77616657 in words is "seventy-seven million, six hundred sixteen thousand, six hundred fifty-seven".