66957490 has 16 divisors (see below), whose sum is σ = 121151448. Its totient is φ = 26643456.

The previous prime is 66957487. The next prime is 66957521. The reversal of 66957490 is 9475966.

It can be written as a sum of positive squares in 4 ways, for example, as 50253921 + 16703569 = 7089^2 + 4087^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66957490.

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, 15417 + ... + 19276.

Almost surely, 2^66957490 is an apocalyptic number.

66957490 is a deficient number, since it is larger than the sum of its proper divisors (54193958).

66957490 is a wasteful number, since it uses less digits than its factorization.

66957490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34893.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 66957490 is about 8182.7556483131. The cubic root of 66957490 is about 406.0688931599.

The spelling of 66957490 in words is "sixty-six million, nine hundred fifty-seven thousand, four hundred ninety".