37072661 has 2 divisors, whose sum is σ = 37072662. Its totient is φ = 37072660.

The previous prime is 37072657. The next prime is 37072663. The reversal of 37072661 is 16627073.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25300900 + 11771761 = 5030^2 + 3431^2 .

It is an emirp because it is prime and its reverse (16627073) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 37072661 - 2² = 37072657 is a prime.

Together with 37072663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37072663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18536330 + 18536331.

It is an arithmetic number, because the mean of its divisors is an integer number (18536331).

Almost surely, 2^37072661 is an apocalyptic number.

It is an amenable number.

37072661 is a deficient number, since it is larger than the sum of its proper divisors (1).

37072661 is an equidigital number, since it uses as much as digits as its factorization.

37072661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 37072661 is about 6088.7322982703. The cubic root of 37072661 is about 333.4401709757.

The spelling of 37072661 in words is "thirty-seven million, seventy-two thousand, six hundred sixty-one".