66140794 has 16 divisors (see below), whose sum is σ = 104797440. Its totient is φ = 31258080.

The previous prime is 66140783. The next prime is 66140819. The reversal of 66140794 is 49704166.

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, 9739 + ... + 15070.

It is an arithmetic number, because the mean of its divisors is an integer number (6549840).

Almost surely, 2^66140794 is an apocalyptic number.

66140794 is a deficient number, since it is larger than the sum of its proper divisors (38656646).

66140794 is a wasteful number, since it uses less digits than its factorization.

66140794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24885.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 66140794 is about 8132.6990599677. The cubic root of 66140794 is about 404.4111627864.

The spelling of 66140794 in words is "sixty-six million, one hundred forty thousand, seven hundred ninety-four".