66841677 has 36 divisors (see below), whose sum is σ = 116494560. Its totient is φ = 36172656.

The previous prime is 66841613. The next prime is 66841681. The reversal of 66841677 is 77614866.

It is not a de Polignac number, because 66841677 - 2⁶ = 66841613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66840677) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 21274 + ... + 24212.

It is an arithmetic number, because the mean of its divisors is an integer number (3235960).

Almost surely, 2^66841677 is an apocalyptic number.

It is an amenable number.

66841677 is a deficient number, since it is larger than the sum of its proper divisors (49652883).

66841677 is a wasteful number, since it uses less digits than its factorization.

66841677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2990 (or 2968 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 66841677 is about 8175.6759353585. The cubic root of 66841677 is about 405.8346390741.

The spelling of 66841677 in words is "sixty-six million, eight hundred forty-one thousand, six hundred seventy-seven".