76760821 has 4 divisors (see below), whose sum is σ = 80098272. Its totient is φ = 73423372.

The previous prime is 76760819. The next prime is 76760839. The reversal of 76760821 is 12806767.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 76760821 - 2¹ = 76760819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76760851) 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, 1668691 + ... + 1668736.

It is an arithmetic number, because the mean of its divisors is an integer number (20024568).

Almost surely, 2^76760821 is an apocalyptic number.

It is an amenable number.

76760821 is a deficient number, since it is larger than the sum of its proper divisors (3337451).

76760821 is a wasteful number, since it uses less digits than its factorization.

76760821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3337450.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 76760821 is about 8761.3252992912. The cubic root of 76760821 is about 424.9911343018.

The spelling of 76760821 in words is "seventy-six million, seven hundred sixty thousand, eight hundred twenty-one".