664546051 has 8 divisors (see below), whose sum is σ = 715952160. Its totient is φ = 613180992.

The previous prime is 664546027. The next prime is 664546067. The reversal of 664546051 is 150645466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 664546051 - 2¹³ = 664537859 is a prime.

It is a super-3 number, since 3×664546051³ (a number of 27 digits) contains 333 as substring.

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 664546051.

It is not an unprimeable number, because it can be changed into a prime (664546651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28935 + ... + 46543.

It is an arithmetic number, because the mean of its divisors is an integer number (89494020).

Almost surely, 2^664546051 is an apocalyptic number.

664546051 is a deficient number, since it is larger than the sum of its proper divisors (51406109).

664546051 is a wasteful number, since it uses less digits than its factorization.

664546051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20525.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 664546051 is about 25778.7907202801. The cubic root of 664546051 is about 872.6532166620.

The spelling of 664546051 in words is "six hundred sixty-four million, five hundred forty-six thousand, fifty-one".