66900037 has 2 divisors, whose sum is σ = 66900038. Its totient is φ = 66900036.

The previous prime is 66900023. The next prime is 66900059. The reversal of 66900037 is 73000966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66601921 + 298116 = 8161^2 + 546^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66900037 is a prime.

It is a super-2 number, since 2×66900037² = 8951229901202738, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 66899981 and 66900008.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66900017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33450018 + 33450019.

It is an arithmetic number, because the mean of its divisors is an integer number (33450019).

Almost surely, 2^66900037 is an apocalyptic number.

It is an amenable number.

66900037 is a deficient number, since it is larger than the sum of its proper divisors (1).

66900037 is an equidigital number, since it uses as much as digits as its factorization.

66900037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 66900037 is about 8179.2442804944. The cubic root of 66900037 is about 405.9527171999.

The spelling of 66900037 in words is "sixty-six million, nine hundred thousand, thirty-seven".