66907274 has 32 divisors (see below), whose sum is σ = 123140736. Its totient is φ = 26611200.

The previous prime is 66907259. The next prime is 66907279. The reversal of 66907274 is 47270966.

It is a super-2 number, since 2×66907274² = 8953166628222152, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66907279) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15449 + ... + 19299.

It is an arithmetic number, because the mean of its divisors is an integer number (3848148).

Almost surely, 2^66907274 is an apocalyptic number.

66907274 is a deficient number, since it is larger than the sum of its proper divisors (56233462).

66907274 is a wasteful number, since it uses less digits than its factorization.

66907274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3950.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 66907274 is about 8179.6866688156. The cubic root of 66907274 is about 405.9673548295.

The spelling of 66907274 in words is "sixty-six million, nine hundred seven thousand, two hundred seventy-four".