1237165666631 has 16 divisors (see below), whose sum is σ = 1294380779328. Its totient is φ = 1181615385600.

The previous prime is 1237165666619. The next prime is 1237165666663. The reversal of 1237165666631 is 1366665617321.

It is a cyclic number.

It is not a de Polignac number, because 1237165666631 - 2⁶ = 1237165666567 is a prime.

It is a super-2 number, since 2×1237165666631² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1237165669631) 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 15 ways as a sum of consecutive naturals, for example, 1658915 + ... + 2286116.

It is an arithmetic number, because the mean of its divisors is an integer number (80898798708).

Almost surely, 2^{1237165666631} is an apocalyptic number.

1237165666631 is a deficient number, since it is larger than the sum of its proper divisors (57215112697).

1237165666631 is an equidigital number, since it uses as much as digits as its factorization.

1237165666631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3945242.

The product of its digits is 4898880, while the sum is 53.

The spelling of 1237165666631 in words is "one trillion, two hundred thirty-seven billion, one hundred sixty-five million, six hundred sixty-six thousand, six hundred thirty-one".