66974810 has 64 divisors (see below), whose sum is σ = 149057280. Its totient is φ = 21150720.

The previous prime is 66974807. The next prime is 66974821. The reversal of 66974810 is 1847966.

It is a super-2 number, since 2×66974810² = 8971250349072200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48530 + ... + 49890.

It is an arithmetic number, because the mean of its divisors is an integer number (2329020).

Almost surely, 2^66974810 is an apocalyptic number.

66974810 is an abundant number, since it is smaller than the sum of its proper divisors (82082470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66974810 is a wasteful number, since it uses less digits than its factorization.

66974810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 66974810 is about 8183.8139030650. The cubic root of 66974810 is about 406.1039029693.

The spelling of 66974810 in words is "sixty-six million, nine hundred seventy-four thousand, eight hundred ten".