64660454 has 4 divisors (see below), whose sum is σ = 96990684. Its totient is φ = 32330226.

The previous prime is 64660447. The next prime is 64660457. The reversal of 64660454 is 45406646.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×64660454² = 8361948622972232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64660457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16165112 + ... + 16165115.

It is an arithmetic number, because the mean of its divisors is an integer number (24247671).

Almost surely, 2^64660454 is an apocalyptic number.

64660454 is a deficient number, since it is larger than the sum of its proper divisors (32330230).

64660454 is a wasteful number, since it uses less digits than its factorization.

64660454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32330229.

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 64660454 is about 8041.1724269537. The cubic root of 64660454 is about 401.3712397159.

The spelling of 64660454 in words is "sixty-four million, six hundred sixty thousand, four hundred fifty-four".