66456745367210 has 64 divisors (see below), whose sum is σ = 131772817612800. Its totient is φ = 23929836790080.

The previous prime is 66456745367171. The next prime is 66456745367213. The reversal of 66456745367210 is 1276354765466.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66456745367213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 172737641 + ... + 173121939.

It is an arithmetic number, because the mean of its divisors is an integer number (2058950275200).

Almost surely, 2^{66456745367210} is an apocalyptic number.

66456745367210 is a deficient number, since it is larger than the sum of its proper divisors (65316072245590).

66456745367210 is a wasteful number, since it uses less digits than its factorization.

66456745367210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399683.

The product of its (nonzero) digits is 152409600, while the sum is 62.

The spelling of 66456745367210 in words is "sixty-six trillion, four hundred fifty-six billion, seven hundred forty-five million, three hundred sixty-seven thousand, two hundred ten".