1657006672 has 20 divisors (see below), whose sum is σ = 3251091520. Its totient is φ = 818015328.

The previous prime is 1657006661. The next prime is 1657006679. The reversal of 1657006672 is 2766007561.

It is a happy number.

It is a super-2 number, since 2×1657006672² = 5491342222105031168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1657006679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 654198 + ... + 656725.

It is an arithmetic number, because the mean of its divisors is an integer number (162554576).

Almost surely, 2^1657006672 is an apocalyptic number.

It is an amenable number.

1657006672 is a deficient number, since it is larger than the sum of its proper divisors (1594084848).

1657006672 is a wasteful number, since it uses less digits than its factorization.

1657006672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311010 (or 1311004 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 1657006672 is about 40706.3468269998. The cubic root of 1657006672 is about 1183.3360236576.

The spelling of 1657006672 in words is "one billion, six hundred fifty-seven million, six thousand, six hundred seventy-two".