661626462 has 32 divisors (see below), whose sum is σ = 1518338304. Its totient is φ = 188280000.

The previous prime is 661626461. The next prime is 661626467. The reversal of 661626462 is 264626166.

It is a self number, because there is not a number n which added to its sum of digits gives 661626462.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661626461) 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, 20839 + ... + 41922.

It is an arithmetic number, because the mean of its divisors is an integer number (47448072).

Almost surely, 2^661626462 is an apocalyptic number.

661626462 is an abundant number, since it is smaller than the sum of its proper divisors (856711842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

661626462 is a wasteful number, since it uses less digits than its factorization.

661626462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63024.

The product of its digits is 124416, while the sum is 39.

The square root of 661626462 is about 25722.1006529405. The cubic root of 661626462 is about 871.3733811120.

The spelling of 661626462 in words is "six hundred sixty-one million, six hundred twenty-six thousand, four hundred sixty-two".