66872634 has 16 divisors (see below), whose sum is σ = 136591488. Its totient is φ = 21816512.

The previous prime is 66872629. The next prime is 66872639. The reversal of 66872634 is 43627866.

It is an interprime number because it is at equal distance from previous prime (66872629) and next prime (66872639).

It is not an unprimeable number, because it can be changed into a prime (66872639) 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, 118287 + ... + 118850.

It is an arithmetic number, because the mean of its divisors is an integer number (8536968).

Almost surely, 2^66872634 is an apocalyptic number.

66872634 is an abundant number, since it is smaller than the sum of its proper divisors (69718854).

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

66872634 is a wasteful number, since it uses less digits than its factorization.

66872634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237189.

The product of its digits is 290304, while the sum is 42.

The square root of 66872634 is about 8177.5689541575. The cubic root of 66872634 is about 405.8972820460.

The spelling of 66872634 in words is "sixty-six million, eight hundred seventy-two thousand, six hundred thirty-four".