66137401 has 4 divisors (see below), whose sum is σ = 72149904. Its totient is φ = 60124900.

The previous prime is 66137377. The next prime is 66137411. The reversal of 66137401 is 10473166.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66137401 - 2⁵ = 66137369 is a prime.

It is a super-2 number, since 2×66137401² = 8748311622069602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66137401.

It is not an unprimeable number, because it can be changed into a prime (66137411) 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, 3006235 + ... + 3006256.

It is an arithmetic number, because the mean of its divisors is an integer number (18037476).

Almost surely, 2^66137401 is an apocalyptic number.

It is an amenable number.

66137401 is a deficient number, since it is larger than the sum of its proper divisors (6012503).

66137401 is a wasteful number, since it uses less digits than its factorization.

66137401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6012502.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 66137401 is about 8132.4904549590. The cubic root of 66137401 is about 404.4042472836.

The spelling of 66137401 in words is "sixty-six million, one hundred thirty-seven thousand, four hundred one".