66790375 has 8 divisors (see below), whose sum is σ = 83354544. Its totient is φ = 53432200.

The previous prime is 66790351. The next prime is 66790397. The reversal of 66790375 is 57309766.

It is not a de Polignac number, because 66790375 - 2⁵ = 66790343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267037 + ... + 267286.

It is an arithmetic number, because the mean of its divisors is an integer number (10419318).

Almost surely, 2^66790375 is an apocalyptic number.

66790375 is a deficient number, since it is larger than the sum of its proper divisors (16564169).

66790375 is an equidigital number, since it uses as much as digits as its factorization.

66790375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534338 (or 534328 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 43.

The square root of 66790375 is about 8172.5378555257. The cubic root of 66790375 is about 405.7307844211.

The spelling of 66790375 in words is "sixty-six million, seven hundred ninety thousand, three hundred seventy-five".