664154955 has 24 divisors (see below), whose sum is σ = 1190900880. Its totient is φ = 342000960.

The previous prime is 664154951. The next prime is 664154957. The reversal of 664154955 is 559451466.

664154955 is a `hidden beast` number, since 66 + 41 + 549 + 5 + 5 = 666.

It is not a de Polignac number, because 664154955 - 2² = 664154951 is a prime.

It is a super-2 number, since 2×664154955² = 882203608502104050, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 664154955.

It is not an unprimeable number, because it can be changed into a prime (664154951) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 253161 + ... + 255770.

It is an arithmetic number, because the mean of its divisors is an integer number (49620870).

Almost surely, 2^664154955 is an apocalyptic number.

664154955 is a deficient number, since it is larger than the sum of its proper divisors (526745925).

664154955 is a wasteful number, since it uses less digits than its factorization.

664154955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508971 (or 508968 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The square root of 664154955 is about 25771.2039881725. The cubic root of 664154955 is about 872.4819929344.

The spelling of 664154955 in words is "six hundred sixty-four million, one hundred fifty-four thousand, nine hundred fifty-five".