66251042 has 48 divisors (see below), whose sum is σ = 119216448. Its totient is φ = 27368640.

The previous prime is 66251021. The next prime is 66251069. The reversal of 66251042 is 24015266.

It is a super-3 number, since 3×66251042³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 382868 + ... + 383040.

It is an arithmetic number, because the mean of its divisors is an integer number (2483676).

Almost surely, 2^66251042 is an apocalyptic number.

66251042 is a deficient number, since it is larger than the sum of its proper divisors (52965406).

66251042 is a wasteful number, since it uses less digits than its factorization.

66251042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 66251042 is about 8139.4743073493. The cubic root of 66251042 is about 404.6357381171.

It can be divided in two parts, 6625 and 1042, that added together give a palindrome (7667).

The spelling of 66251042 in words is "sixty-six million, two hundred fifty-one thousand, forty-two".