66975942 has 16 divisors (see below), whose sum is σ = 146129472. Its totient is φ = 20295720.

The previous prime is 66975929. The next prime is 66975943. The reversal of 66975942 is 24957966.

It is a junction number, because it is equal to n+sod(n) for n = 66975891 and 66975900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66975943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 507328 + ... + 507459.

It is an arithmetic number, because the mean of its divisors is an integer number (9133092).

Almost surely, 2^66975942 is an apocalyptic number.

66975942 is an abundant number, since it is smaller than the sum of its proper divisors (79153530).

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

66975942 is a wasteful number, since it uses less digits than its factorization.

66975942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014803.

The product of its digits is 816480, while the sum is 48.

The square root of 66975942 is about 8183.8830636807. The cubic root of 66975942 is about 406.1061909292.

The spelling of 66975942 in words is "sixty-six million, nine hundred seventy-five thousand, nine hundred forty-two".