66900513 has 16 divisors (see below), whose sum is σ = 91008000. Its totient is φ = 43701840.

The previous prime is 66900467. The next prime is 66900517. The reversal of 66900513 is 31500966.

It is a happy number.

It is not a de Polignac number, because 66900513 - 2¹⁰ = 66899489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66900517) 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, 105708 + ... + 106338.

It is an arithmetic number, because the mean of its divisors is an integer number (5688000).

Almost surely, 2^66900513 is an apocalyptic number.

It is an amenable number.

66900513 is a deficient number, since it is larger than the sum of its proper divisors (24107487).

66900513 is a wasteful number, since it uses less digits than its factorization.

66900513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 66900513 is about 8179.2733784854. The cubic root of 66900513 is about 405.9536799947.

The spelling of 66900513 in words is "sixty-six million, nine hundred thousand, five hundred thirteen".