1664403097 has 16 divisors (see below), whose sum is σ = 2016716800. Its totient is φ = 1341807120.

The previous prime is 1664403053. The next prime is 1664403101. The reversal of 1664403097 is 7903044661.

It is a cyclic number.

It is not a de Polignac number, because 1664403097 - 2²⁷ = 1530185369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1664403007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26529 + ... + 63502.

It is an arithmetic number, because the mean of its divisors is an integer number (126044800).

Almost surely, 2^1664403097 is an apocalyptic number.

It is an amenable number.

1664403097 is a deficient number, since it is larger than the sum of its proper divisors (352313703).

1664403097 is a wasteful number, since it uses less digits than its factorization.

1664403097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90196.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 1664403097 is about 40797.0966736605. The cubic root of 1664403097 is about 1185.0941065988.

The spelling of 1664403097 in words is "one billion, six hundred sixty-four million, four hundred three thousand, ninety-seven".