664156346 has 16 divisors (see below), whose sum is σ = 1141205760. Its totient is φ = 283975440.

The previous prime is 664156321. The next prime is 664156387. The reversal of 664156346 is 643651466.

It is a super-2 number, since 2×664156346² = 882207303864143432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49001 + ... + 61068.

It is an arithmetic number, because the mean of its divisors is an integer number (71325360).

Almost surely, 2^664156346 is an apocalyptic number.

664156346 is a deficient number, since it is larger than the sum of its proper divisors (477049414).

664156346 is a wasteful number, since it uses less digits than its factorization.

664156346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110509.

The product of its digits is 311040, while the sum is 41.

The square root of 664156346 is about 25771.2309756441. The cubic root of 664156346 is about 872.4826020400.

The spelling of 664156346 in words is "six hundred sixty-four million, one hundred fifty-six thousand, three hundred forty-six".