66373131 has 16 divisors (see below), whose sum is σ = 96975360. Its totient is φ = 40045920.

The previous prime is 66373129. The next prime is 66373157. The reversal of 66373131 is 13137366.

It is not a de Polignac number, because 66373131 - 2¹ = 66373129 is a prime.

It is a super-2 number, since 2×66373131² = 8810785037486322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66373031) 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, 3166 + ... + 11948.

It is an arithmetic number, because the mean of its divisors is an integer number (6060960).

Almost surely, 2^66373131 is an apocalyptic number.

66373131 is a deficient number, since it is larger than the sum of its proper divisors (30602229).

66373131 is a wasteful number, since it uses less digits than its factorization.

66373131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9026.

The product of its digits is 6804, while the sum is 30.

The square root of 66373131 is about 8146.9706639953. The cubic root of 66373131 is about 404.8841430530.

The spelling of 66373131 in words is "sixty-six million, three hundred seventy-three thousand, one hundred thirty-one".