37662616021 has 4 divisors (see below), whose sum is σ = 37665393472. Its totient is φ = 37659838572.

The previous prime is 37662615997. The next prime is 37662616027. The reversal of 37662616021 is 12061626673.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 37662616021 - 2¹⁵ = 37662583253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37662616027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1368285 + ... + 1395538.

It is an arithmetic number, because the mean of its divisors is an integer number (9416348368).

Almost surely, 2^37662616021 is an apocalyptic number.

It is an amenable number.

37662616021 is a deficient number, since it is larger than the sum of its proper divisors (2777451).

37662616021 is a wasteful number, since it uses less digits than its factorization.

37662616021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777450.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 37662616021 in words is "thirty-seven billion, six hundred sixty-two million, six hundred sixteen thousand, twenty-one".