76642217 has 4 divisors (see below), whose sum is σ = 76685136. Its totient is φ = 76599300.

The previous prime is 76642213. The next prime is 76642229. The reversal of 76642217 is 71224667.

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 76642217 - 2² = 76642213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76642213) 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, 18659 + ... + 22392.

It is an arithmetic number, because the mean of its divisors is an integer number (19171284).

Almost surely, 2^76642217 is an apocalyptic number.

It is an amenable number.

76642217 is a deficient number, since it is larger than the sum of its proper divisors (42919).

76642217 is a wasteful number, since it uses less digits than its factorization.

76642217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42918.

The product of its digits is 28224, while the sum is 35.

The square root of 76642217 is about 8754.5540720245. The cubic root of 76642217 is about 424.7721352911.

The spelling of 76642217 in words is "seventy-six million, six hundred forty-two thousand, two hundred seventeen".