66745402 has 16 divisors (see below), whose sum is σ = 106246080. Its totient is φ = 31379392.

The previous prime is 66745397. The next prime is 66745411. The reversal of 66745402 is 20454766.

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, 9583 + ... + 15010.

It is an arithmetic number, because the mean of its divisors is an integer number (6640380).

Almost surely, 2^66745402 is an apocalyptic number.

66745402 is a deficient number, since it is larger than the sum of its proper divisors (39500678).

66745402 is a wasteful number, since it uses less digits than its factorization.

66745402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24677.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 66745402 is about 8169.7859213079. The cubic root of 66745402 is about 405.6396983048.

The spelling of 66745402 in words is "sixty-six million, seven hundred forty-five thousand, four hundred two".