66732501 has 16 divisors (see below), whose sum is σ = 97634880. Its totient is φ = 40206720.

The previous prime is 66732493. The next prime is 66732521. The reversal of 66732501 is 10523766.

It is not a de Polignac number, because 66732501 - 2³ = 66732493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66732521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136 + ... + 11553.

It is an arithmetic number, because the mean of its divisors is an integer number (6102180).

Almost surely, 2^66732501 is an apocalyptic number.

It is an amenable number.

66732501 is a deficient number, since it is larger than the sum of its proper divisors (30902379).

66732501 is a wasteful number, since it uses less digits than its factorization.

66732501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11876.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 66732501 is about 8168.9963275790. The cubic root of 66732501 is about 405.6135616981.

The spelling of 66732501 in words is "sixty-six million, seven hundred thirty-two thousand, five hundred one".