37661994 has 24 divisors (see below), whose sum is σ = 85149792. Its totient is φ = 12008040.

The previous prime is 37661989. The next prime is 37661999. The reversal of 37661994 is 49916673.

It is an interprime number because it is at equal distance from previous prime (37661989) and next prime (37661999).

It is not an unprimeable number, because it can be changed into a prime (37661999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45072 + ... + 45899.

It is an arithmetic number, because the mean of its divisors is an integer number (3547908).

Almost surely, 2^37661994 is an apocalyptic number.

37661994 is an abundant number, since it is smaller than the sum of its proper divisors (47487798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

37661994 is a wasteful number, since it uses less digits than its factorization.

37661994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91002 (or 90999 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 37661994 is about 6136.9368580750. The cubic root of 37661994 is about 335.1977565577.

The spelling of 37661994 in words is "thirty-seven million, six hundred sixty-one thousand, nine hundred ninety-four".