66974355 has 48 divisors (see below), whose sum is σ = 133548480. Its totient is φ = 30415104.

The previous prime is 66974333. The next prime is 66974363. The reversal of 66974355 is 55347966.

It is not a de Polignac number, because 66974355 - 2⁸ = 66974099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 66974355.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 53881 + ... + 55109.

It is an arithmetic number, because the mean of its divisors is an integer number (2782260).

Almost surely, 2^66974355 is an apocalyptic number.

66974355 is a deficient number, since it is larger than the sum of its proper divisors (66574125).

66974355 is a wasteful number, since it uses less digits than its factorization.

66974355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420 (or 1417 counting only the distinct ones).

The product of its digits is 680400, while the sum is 45.

The square root of 66974355 is about 8183.7861042429. The cubic root of 66974355 is about 406.1029833316.

The spelling of 66974355 in words is "sixty-six million, nine hundred seventy-four thousand, three hundred fifty-five".