66772371 has 8 divisors (see below), whose sum is σ = 89070544. Its totient is φ = 44494560.

The previous prime is 66772367. The next prime is 66772373. The reversal of 66772371 is 17327766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66772371 - 2² = 66772367 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66772373) 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, 6045 + ... + 13041.

It is an arithmetic number, because the mean of its divisors is an integer number (11133818).

Almost surely, 2^66772371 is an apocalyptic number.

66772371 is a deficient number, since it is larger than the sum of its proper divisors (22298173).

66772371 is a wasteful number, since it uses less digits than its factorization.

66772371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10181.

The product of its digits is 74088, while the sum is 39.

The square root of 66772371 is about 8171.4362874589. The cubic root of 66772371 is about 405.6943249088.

The spelling of 66772371 in words is "sixty-six million, seven hundred seventy-two thousand, three hundred seventy-one".