64669701 has 4 divisors (see below), whose sum is σ = 86226272. Its totient is φ = 43113132.

The previous prime is 64669679. The next prime is 64669733. The reversal of 64669701 is 10796646.

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 not a de Polignac number, because 64669701 - 2¹⁰ = 64668677 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64669701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64669741) 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, 10778281 + ... + 10778286.

It is an arithmetic number, because the mean of its divisors is an integer number (21556568).

Almost surely, 2^64669701 is an apocalyptic number.

It is an amenable number.

64669701 is a deficient number, since it is larger than the sum of its proper divisors (21556571).

64669701 is a wasteful number, since it uses less digits than its factorization.

64669701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21556570.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 64669701 is about 8041.7473847417. The cubic root of 64669701 is about 401.3903719815.

The spelling of 64669701 in words is "sixty-four million, six hundred sixty-nine thousand, seven hundred one".