66737630 has 8 divisors (see below), whose sum is σ = 120127752. Its totient is φ = 26695048.

The previous prime is 66737617. The next prime is 66737639. The reversal of 66737630 is 3673766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66737630² = 8907822516033800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66737639) 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, 3336872 + ... + 3336891.

It is an arithmetic number, because the mean of its divisors is an integer number (15015969).

Almost surely, 2^66737630 is an apocalyptic number.

66737630 is a deficient number, since it is larger than the sum of its proper divisors (53390122).

66737630 is a wasteful number, since it uses less digits than its factorization.

66737630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6673770.

The product of its (nonzero) digits is 95256, while the sum is 38.

The square root of 66737630 is about 8169.3102524020. The cubic root of 66737630 is about 405.6239531297.

The spelling of 66737630 in words is "sixty-six million, seven hundred thirty-seven thousand, six hundred thirty".