37220661 has 16 divisors (see below), whose sum is σ = 56488320. Its totient is φ = 24207840.

The previous prime is 37220653. The next prime is 37220737. The reversal of 37220661 is 16602273.

It is a happy number.

It is not a de Polignac number, because 37220661 - 2³ = 37220653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37220641) 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, 15705 + ... + 17918.

It is an arithmetic number, because the mean of its divisors is an integer number (3530520).

Almost surely, 2^37220661 is an apocalyptic number.

It is an amenable number.

37220661 is a deficient number, since it is larger than the sum of its proper divisors (19267659).

37220661 is a wasteful number, since it uses less digits than its factorization.

37220661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33673 (or 33667 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 37220661 is about 6100.8737898763. The cubic root of 37220661 is about 333.8832973420.

The spelling of 37220661 in words is "thirty-seven million, two hundred twenty thousand, six hundred sixty-one".