66945746 has 32 divisors (see below), whose sum is σ = 119508480. Its totient is φ = 27518400.

The previous prime is 66945701. The next prime is 66945751. The reversal of 66945746 is 64754966.

It is a self number, because there is not a number n which added to its sum of digits gives 66945746.

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, 73031 + ... + 73941.

It is an arithmetic number, because the mean of its divisors is an integer number (3734640).

Almost surely, 2^66945746 is an apocalyptic number.

66945746 is a deficient number, since it is larger than the sum of its proper divisors (52562734).

66945746 is a wasteful number, since it uses less digits than its factorization.

66945746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130.

The product of its digits is 1088640, while the sum is 47.

The square root of 66945746 is about 8182.0380101781. The cubic root of 66945746 is about 406.0451509720.

The spelling of 66945746 in words is "sixty-six million, nine hundred forty-five thousand, seven hundred forty-six".