66456701 has 4 divisors (see below), whose sum is σ = 66532512. Its totient is φ = 66380892.

The previous prime is 66456679. The next prime is 66456703. The reversal of 66456701 is 10765466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66456701 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66456703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36575 + ... + 38348.

It is an arithmetic number, because the mean of its divisors is an integer number (16633128).

Almost surely, 2^66456701 is an apocalyptic number.

It is an amenable number.

66456701 is a deficient number, since it is larger than the sum of its proper divisors (75811).

66456701 is an equidigital number, since it uses as much as digits as its factorization.

66456701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75810.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 66456701 is about 8152.0979508345. The cubic root of 66456701 is about 405.0540008267.

The spelling of 66456701 in words is "sixty-six million, four hundred fifty-six thousand, seven hundred one".