612374661 has 20 divisors (see below), whose sum is σ = 917373600. Its totient is φ = 407093256.

The previous prime is 612374657. The next prime is 612374681. The reversal of 612374661 is 166473216.

It is a happy number.

612374661 is a `hidden beast` number, since 612 + 37 + 4 + 6 + 6 + 1 = 666.

It is not a de Polignac number, because 612374661 - 2² = 612374657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612374621) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18550 + ... + 39608.

It is an arithmetic number, because the mean of its divisors is an integer number (45868680).

Almost surely, 2^612374661 is an apocalyptic number.

It is an amenable number.

612374661 is a deficient number, since it is larger than the sum of its proper divisors (304998939).

612374661 is a wasteful number, since it uses less digits than its factorization.

612374661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21430 (or 21421 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 612374661 is about 24746.2049817745. The cubic root of 612374661 is about 849.1916934077.

The spelling of 612374661 in words is "six hundred twelve million, three hundred seventy-four thousand, six hundred sixty-one".