1664404052 has 6 divisors (see below), whose sum is σ = 2912707098. Its totient is φ = 832202024.

The previous prime is 1664404037. The next prime is 1664404069. The reversal of 1664404052 is 2504044661.

It can be written as a sum of positive squares in only one way, i.e., 1174844176 + 489559876 = 34276^2 + 22126^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208050503 + ... + 208050510.

It is an arithmetic number, because the mean of its divisors is an integer number (485451183).

Almost surely, 2^1664404052 is an apocalyptic number.

It is an amenable number.

1664404052 is a deficient number, since it is larger than the sum of its proper divisors (1248303046).

1664404052 is a wasteful number, since it uses less digits than its factorization.

1664404052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416101017 (or 416101015 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 1664404052 is about 40797.1083779231. The cubic root of 1664404052 is about 1185.0943332595.

The spelling of 1664404052 in words is "one billion, six hundred sixty-four million, four hundred four thousand, fifty-two".