77670067 has 4 divisors (see below), whose sum is σ = 79769296. Its totient is φ = 75570840.

The previous prime is 77670053. The next prime is 77670101. The reversal of 77670067 is 76007677.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77670067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77670007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1049559 + ... + 1049632.

It is an arithmetic number, because the mean of its divisors is an integer number (19942324).

Almost surely, 2^77670067 is an apocalyptic number.

77670067 is a deficient number, since it is larger than the sum of its proper divisors (2099229).

77670067 is a wasteful number, since it uses less digits than its factorization.

77670067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2099228.

The product of its (nonzero) digits is 86436, while the sum is 40.

The square root of 77670067 is about 8813.0622941177. The cubic root of 77670067 is about 426.6625846642.

The spelling of 77670067 in words is "seventy-seven million, six hundred seventy thousand, sixty-seven".