66498730 has 32 divisors (see below), whose sum is σ = 127168704. Its totient is φ = 24950016.

The previous prime is 66498709. The next prime is 66498743. The reversal of 66498730 is 3789466.

It is a happy number.

It is a super-2 number, since 2×66498730² = 8844162183225800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74869 + ... + 75751.

It is an arithmetic number, because the mean of its divisors is an integer number (3974022).

Almost surely, 2^66498730 is an apocalyptic number.

66498730 is a deficient number, since it is larger than the sum of its proper divisors (60669974).

66498730 is a wasteful number, since it uses less digits than its factorization.

66498730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 66498730 is about 8154.6753460821. The cubic root of 66498730 is about 405.1393718366.

The spelling of 66498730 in words is "sixty-six million, four hundred ninety-eight thousand, seven hundred thirty".