64672401 has 4 divisors (see below), whose sum is σ = 86229872. Its totient is φ = 43114932.

The previous prime is 64672397. The next prime is 64672427. The reversal of 64672401 is 10427646.

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 64672401 - 2² = 64672397 is a prime.

It is a super-2 number, since 2×64672401² = 8365038902209602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64672441) 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, 10778731 + ... + 10778736.

It is an arithmetic number, because the mean of its divisors is an integer number (21557468).

Almost surely, 2^64672401 is an apocalyptic number.

It is an amenable number.

64672401 is a deficient number, since it is larger than the sum of its proper divisors (21557471).

64672401 is a wasteful number, since it uses less digits than its factorization.

64672401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21557470.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 64672401 is about 8041.9152569522. The cubic root of 64672401 is about 401.3959580025.

The spelling of 64672401 in words is "sixty-four million, six hundred seventy-two thousand, four hundred one".