1660072851 has 6 divisors (see below), whose sum is σ = 2397883020. Its totient is φ = 1106715228.

The previous prime is 1660072819. The next prime is 1660072859. The reversal of 1660072851 is 1582700661.

It is not a de Polignac number, because 1660072851 - 2⁵ = 1660072819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1660072859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 92226261 + ... + 92226278.

It is an arithmetic number, because the mean of its divisors is an integer number (399647170).

Almost surely, 2^1660072851 is an apocalyptic number.

1660072851 is a deficient number, since it is larger than the sum of its proper divisors (737810169).

1660072851 is a wasteful number, since it uses less digits than its factorization.

1660072851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184452545 (or 184452542 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 1660072851 is about 40743.9915938534. The cubic root of 1660072851 is about 1184.0654683922.

The spelling of 1660072851 in words is "one billion, six hundred sixty million, seventy-two thousand, eight hundred fifty-one".